Dug and processed some horseradish root yesterday. If you’d like your own patch, I have some ready-to-plant crowns that I’ll ship to the first person that PM’s me with their mailing address.
fall is best but either time works. in the fall its stronger, -- spring has a slight "green taste" to it but still great!! lol!! Any month with an "R" in it is good!
When I dig in the Spring, I only do it before the new leaves start to emerge from the crown. When I dig in the Fall, it is after a heavy frost when the leaves have died back.